Do sbc 350 heads fit on sbc 400 blocks? Got a sbc 400 for $800, but need to know if i have to get new heads or if i can throw my 350 heads right on. any reply is very helpful>
Projects: '77 Jimmy, w/350- soon to be sbc 400
'70 something sandrail- just frame and rear axle

Welcome. Be sure to read the new member posts at the top of each forum. Lots of good info including advice on posting questions in the proper forum for best exposure to the appropriate experts. I'll move this to the engine forum.

Just drill the lower 3 holes. They go straight in. The upper three holes are on an angle. If you buy aftermarket heads they tell you not to drill the upper 3 holes. Because you have a real good chance of screwing up. The lower 3 holes are the important ones. Its where the steam builds up under the siamese casting.

Just drill the lower 3 holes. They go straight in. The upper three holes are on an angle. If you buy aftermarket heads they tell you not to drill the upper 3 holes. Because you have a real good chance of screwing up. The lower 3 holes are the important ones. Its where the steam builds up under the siamese casting.

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